It might feel like being "not as sharp", but perhaps it's more self-awareness. As I grow older, I'm not any dumber or less wise, but I'm definitely far more a

It might feel like being "not as sharp", but perhaps it's more self-awareness. As I grow older, I'm not any dumber or less wise, but I'm definitely far more aware of what I don't know. Additionally, technology systems are getting more and more complex, which exacerbates the feeling. This is a big reason why I focus hard on and continually revisit the fundamentals. Being an expert on the fundamentals of systems will save you.